Annotation of loncom/xml/lonxml.pm, revision 1.192

1.2       sakharuk    1: # The LearningOnline Network with CAPA
1.3       sakharuk    2: # XML Parser Module 
1.2       sakharuk    3: #
1.192   ! albertel    4: # $Id: lonxml.pm,v 1.191 2002/09/04 04:55:13 albertel Exp $
1.139     www         5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
                     28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
                     29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
                     30: # binary executable programs or libraries distributed by the 
                     31: # Michigan State University (the "Licensee"), but any binaries so 
                     32: # distributed are hereby licensed only for use in the context
                     33: # of a program or computational system for which the Licensee is the 
                     34: # primary author or distributor, and which performs substantial 
                     35: # additional tasks beyond the translation of (La)TeX into HTML.
                     36: # The C source of the Code may not be distributed by the Licensee
                     37: # to any other parties under any circumstances.
                     38: #
1.3       sakharuk   39: # last modified 06/26/00 by Alexander Sakharuk
1.33      www        40: # 11/6 Gerd Kortemeyer
1.45      www        41: # 6/1/1 Gerd Kortemeyer
1.56      albertel   42: # 2/21,3/13 Guy
1.68      www        43: # 3/29,5/4 Gerd Kortemeyer
1.73      harris41   44: # 5/10 Scott Harrison
1.78      www        45: # 5/26 Gerd Kortemeyer
1.80      harris41   46: # 5/27 H. K. Ng
1.89      www        47: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
1.93      ng         48: # 6/12,6/13 H. K. Ng
1.95      www        49: # 6/16 Gerd Kortemeyer
1.104     ng         50: # 7/27 H. K. Ng
1.127     www        51: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
1.130     www        52: # Guy Albertelli
                     53: # 9/26 Gerd Kortemeyer
1.143     www        54: # Dec Guy Albertelli
                     55: # YEAR=2002
                     56: # 1/1 Gerd Kortemeyer
1.145     www        57: # 1/2 Matthew Hall
                     58: # 1/3 Gerd Kortemeyer
1.143     www        59: #
1.2       sakharuk   60: 
1.4       albertel   61: package Apache::lonxml; 
1.33      www        62: use vars 
1.169     albertel   63: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode);
1.1       sakharuk   64: use strict;
1.167     albertel   65: use HTML::LCParser();
1.161     albertel   66: use HTML::TreeBuilder();
                     67: use HTML::Entities();
                     68: use Safe();
                     69: use Safe::Hole();
                     70: use Math::Cephes();
                     71: use Math::Random();
                     72: use Opcode();
1.72      albertel   73: 
                     74: sub register {
1.141     albertel   75:   my ($space,@taglist) = @_;
                     76:   foreach my $temptag (@taglist) {
                     77:     push(@{ $Apache::lonxml::alltags{$temptag} },$space);
1.72      albertel   78:   }
                     79: }
                     80: 
1.141     albertel   81: sub deregister {
                     82:   my ($space,@taglist) = @_;
                     83:   foreach my $temptag (@taglist) {
                     84:     my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
                     85:     if ($tempspace eq $space) {
                     86:       pop(@{ $Apache::lonxml::alltags{$temptag} });
                     87:     }
                     88:   }
1.142     albertel   89:   #&printalltags();
1.141     albertel   90: }
                     91: 
1.46      www        92: use Apache::Constants qw(:common);
1.161     albertel   93: use Apache::lontexconvert();
                     94: use Apache::style();
                     95: use Apache::run();
                     96: use Apache::londefdef();
                     97: use Apache::scripttag();
                     98: use Apache::edit();
                     99: use Apache::lonnet();
                    100: use Apache::File();
                    101: use Apache::loncommon();
1.79      www       102: 
1.72      albertel  103: #==================================================   Main subroutine: xmlparse  
                    104: #debugging control, to turn on debugging modify the correct handler
                    105: $Apache::lonxml::debug=0;
                    106: 
                    107: #path to the directory containing the file currently being processed
                    108: @pwd=();
                    109: 
                    110: #these two are used for capturing a subset of the output for later processing,
                    111: #don't touch them directly use &startredirection and &endredirection
                    112: @outputstack = ();
                    113: $redirection = 0;
                    114: 
                    115: #controls wheter the <import> tag actually does
                    116: $import = 1;
                    117: @extlinks=();
                    118: 
                    119: # meta mode is a bit weird only some output is to be turned off
                    120: #<output> tag turns metamode off (defined in londefdef.pm)
                    121: $metamode = 0;
                    122: 
                    123: # turns on and of run::evaluate actually derefencing var refs
                    124: $evaluate = 1;
1.7       albertel  125: 
1.74      albertel  126: # data structure for eidt mode, determines what tags can go into what other tags
                    127: %insertlist=();
1.68      www       128: 
1.99      albertel  129: # stores the list of active tag namespaces
1.76      albertel  130: @namespace=();
                    131: 
1.169     albertel  132: # if 0 all high ASCII characters will be encoded into HTML Entities
                    133: $prevent_entity_encode=0;
                    134: 
1.99      albertel  135: # has the dynamic menu been updated to know about this resource
                    136: $Apache::lonxml::registered=0;
                    137: 
1.172     albertel  138: # a pointer the the Apache request object
                    139: $Apache::lonxml::request='';
                    140: 
1.68      www       141: sub xmlbegin {
                    142:   my $output='';
                    143:   if ($ENV{'browser.mathml'}) {
                    144:       $output='<?xml version="1.0"?>'
                    145:             .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
                    146:             .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
                    147:             .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
                    148:             .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 
                    149: 		.'xmlns="http://www.w3.org/TR/REC-html40">';
                    150:   } else {
                    151:       $output='<html>';
                    152:   }
                    153:   return $output;
                    154: }
                    155: 
                    156: sub xmlend {
1.103     www       157:     my $discussion='';
                    158:     if ($ENV{'request.course.id'}) {
1.109     www       159:        my $crs='/'.$ENV{'request.course.id'};
                    160:        if ($ENV{'request.course.sec'}) {
                    161:           $crs.='_'.$ENV{'request.course.sec'};
                    162:        }                 
                    163:        $crs=~s/\_/\//g;
                    164:        my $seeid=&Apache::lonnet::allowed('rin',$crs);
1.103     www       165:        my $symb=&Apache::lonnet::symbread();
                    166:        if ($symb) {
                    167:           my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
                    168:                      $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
                    169: 		     $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
                    170:           if ($contrib{'version'}) {
                    171:               $discussion.=
                    172:                   '<address><hr /><h2>Course Discussion of Resource</h2>';
                    173:               my $idx;
                    174:               for ($idx=1;$idx<=$contrib{'version'};$idx++) {
1.110     www       175: 		my $hidden=($contrib{'hidden'}=~/\.$idx\./);
                    176: 		unless (($hidden) && (!$seeid)) {
                    177:                  my $message=$contrib{$idx.':message'};
                    178:                  $message=~s/\n/\<br \/\>/g;
1.186     www       179: 		 $message=&Apache::lontexconvert::msgtexconverted($message);
1.110     www       180:                  if ($message) {
                    181:                   if ($hidden) {
                    182: 		      $message='<font color="#888888">'.$message.'</font>';
                    183:                   }
1.109     www       184:                   my $sender='Anonymous';
                    185:                   if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
1.164     www       186:                       $sender=$contrib{$idx.':plainname'}.' ('.
                    187:                               $contrib{$idx.':sendername'}.' at '.
                    188: 		      $contrib{$idx.':senderdomain'}.')';
1.109     www       189:                       if ($contrib{$idx.':anonymous'}) {
1.164     www       190: 			  $sender.=' [anonymous] '.
                    191:                                      $contrib{$idx.':screenname'};
1.110     www       192:                       }
                    193:                       if ($seeid) {
                    194: 			  if ($hidden) {
                    195:                              $sender.=' <a href="/adm/feedback?unhide='.
                    196: 				 $symb.':::'.$idx.'">Make Visible</a>';
                    197:                           } else {
                    198:                              $sender.=' <a href="/adm/feedback?hide='.
                    199: 				 $symb.':::'.$idx.'">Hide</a>';
                    200: 			  }
1.109     www       201:                       }                   
1.164     www       202:                   } else {
                    203:                       if ($contrib{$idx.':screenname'}) {
                    204: 			  $sender='<i>'.$contrib{$idx.':screenname'}.'</i>';
                    205:                       }
1.109     www       206:                   }
                    207: 		  $discussion.='<p><b>'.$sender.'</b> ('.
1.103     www       208:                       localtime($contrib{$idx.':timestamp'}).
                    209:                       '):<blockquote>'.$message.
1.110     www       210:                       '</blockquote></p>';
                    211: 	        }
                    212:                } 
1.103     www       213:               }
                    214:               $discussion.='</address>';
                    215:           }
                    216:        }
                    217:     }
                    218:     return $discussion.'</html>';
1.119     www       219: }
                    220: 
                    221: sub tokeninputfield {
1.120     www       222:     my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
                    223:     $defhost=~tr/a-z/A-Z/;
1.119     www       224:     return (<<ENDINPUTFIELD)
1.120     www       225: <script>
                    226:     function updatetoken() {
                    227: 	var comp=new Array;
                    228:         var barcode=unescape(document.tokeninput.barcode.value);
                    229:         comp=barcode.split('*');
                    230:         if (typeof(comp[0])!="undefined") {
                    231: 	    document.tokeninput.codeone.value=comp[0];
                    232: 	}
                    233:         if (typeof(comp[1])!="undefined") {
                    234: 	    document.tokeninput.codetwo.value=comp[1];
                    235: 	}
                    236:         if (typeof(comp[2])!="undefined") {
                    237:             comp[2]=comp[2].toUpperCase();
                    238: 	    document.tokeninput.codethree.value=comp[2];
                    239: 	}
                    240:         document.tokeninput.barcode.value='';
                    241:     }  
                    242: </script>
                    243: <form method="post" name="tokeninput">
1.119     www       244: <table border="2" bgcolor="#FFFFBB">
                    245: <tr><th>DocID Checkin</th></tr>
                    246: <tr><td>
                    247: <table>
                    248: <tr>
                    249: <td>Scan in Barcode</td>
1.120     www       250: <td><input type="text" size="22" name="barcode" 
                    251: onChange="updatetoken()"/></td>
1.119     www       252: </tr>
                    253: <tr><td><i>or</i> Type in DocID</td>
                    254: <td>
                    255: <input type="text" size="5" name="codeone" />
1.120     www       256: <b><font size="+2">*</font></b>
1.119     www       257: <input type="text" size="5" name="codetwo" />
1.120     www       258: <b><font size="+2">*</font></b>
                    259: <input type="text" size="10" name="codethree" value="$defhost" 
                    260: onChange="this.value=this.value.toUpperCase()" />
1.119     www       261: </td></tr>
                    262: </table>
                    263: </td></tr>
                    264: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
                    265: </table>
                    266: </form>
                    267: ENDINPUTFIELD
1.112     www       268: }
                    269: 
1.116     www       270: sub maketoken {
1.118     www       271:     my ($symb,$tuname,$tudom,$tcrsid)=@_;
1.112     www       272:     unless ($symb) {
                    273: 	$symb=&Apache::lonnet::symbread();
                    274:     }
                    275:     unless ($tuname) {
                    276: 	$tuname=$ENV{'user.name'};
                    277:         $tudom=$ENV{'user.domain'};
                    278:         $tcrsid=$ENV{'request.course.id'};
                    279:     }
1.116     www       280: 
1.118     www       281:     return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
                    282: }
                    283: 
                    284: sub printtokenheader {
1.133     albertel  285:     my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
1.116     www       286:     unless ($token) { return ''; }
1.118     www       287: 
1.133     albertel  288:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    289:     unless ($tsymb) {
                    290: 	$tsymb=$symb;
1.118     www       291:     }
                    292:     unless ($tuname) {
1.133     albertel  293: 	$tuname=$name;
                    294:         $tudom=$domain;
                    295:         $tcrsid=$courseid;
1.118     www       296:     }
1.114     www       297: 
                    298:     my %reply=&Apache::lonnet::get('environment',
                    299:               ['firstname','middlename','lastname','generation'],
                    300:               $tudom,$tuname);
                    301:     my $plainname=$reply{'firstname'}.' '. 
                    302:                   $reply{'middlename'}.' '.
                    303:                   $reply{'lastname'}.' '.
                    304: 		  $reply{'generation'};
                    305: 
1.112     www       306:     if ($target eq 'web') {
1.145     www       307:         my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
1.115     www       308: 	return 
                    309:  '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
                    310:                'Checked out for '.$plainname.
1.114     www       311:                '<br />User: '.$tuname.' at '.$tudom.
1.145     www       312: 	       '<br />ID: '.$idhash{$tuname}.
1.117     www       313: 	       '<br />CourseID: '.$tcrsid.
1.145     www       314: 	       '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
1.114     www       315:                '<br />DocID: '.$token.
1.116     www       316:                '<br />Time: '.localtime().'<hr />';
1.112     www       317:     } else {
1.121     albertel  318:         return $token;
1.112     www       319:     }
1.68      www       320: }
                    321: 
1.70      www       322: sub fontsettings() {
                    323:     my $headerstring='';
                    324:     if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { 
                    325:          $headerstring.=
                    326:              '<meta Content-Type="text/html; charset=x-mac-roman">';
                    327:     }
                    328:     return $headerstring;
                    329: }
                    330: 
1.68      www       331: sub registerurl {
1.100     www       332:     my $forcereg=shift;
1.155     matthew   333:     my $target = shift;
                    334:     my $result = '';
1.179     matthew   335:     if ($target eq 'edit') {
1.187     matthew   336:         $result .="<script>\n".
                    337:             "if (typeof menu != 'undefined') {menu.currentURL=null;}\n".
1.179     matthew   338:             &Apache::loncommon::browser_and_searcher_javascript().
                    339:                 "\n</script>\n";
                    340:     }
1.176     www       341:     if ((($ENV{'request.publicaccess'}) || 
                    342:          (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) &&
                    343:         (!$forcereg)) {
1.179     matthew   344: 	return $result.
1.130     www       345:          '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
                    346:     }
1.128     albertel  347:     if ($Apache::lonxml::registered && !$forcereg) { return ''; }
1.105     albertel  348:     $Apache::lonxml::registered=1;
1.159     www       349:     my $nothing='';
                    350:     if ($ENV{'browser.type'} eq 'explorer') { $nothing='javascript:void(0);'; }
1.181     www       351:     my $timesync='menu.syncclock(1000*'.time.');';
1.100     www       352:     if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
1.87      www       353:         my $hwkadd='';
1.168     albertel  354:         if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
1.87      www       355: 	    if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
                    356: 		$hwkadd.=(<<ENDSUBM);
1.168     albertel  357:                      menu.switchbutton(7,1,'subm.gif','view sub','missions','gocmd("/adm/grades","submission")');
1.87      www       358: ENDSUBM
                    359:             }
                    360: 	    if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
                    361: 		$hwkadd.=(<<ENDGRDS);
1.171     albertel  362:                      menu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","gradingmenu")');
1.87      www       363: ENDGRDS
                    364:             }
                    365: 	    if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
                    366: 		$hwkadd.=(<<ENDPARM);
1.168     albertel  367:                      menu.switchbutton(7,3,'pparm.gif','problem','parms','gocmd("/adm/parmset","set")');
1.87      www       368: ENDPARM
                    369:             }
                    370: 	}
1.155     matthew   371: 	$result = (<<ENDREGTHIS);
1.87      www       372:      
1.68      www       373: <script language="JavaScript">
1.71      www       374: // BEGIN LON-CAPA Internal
1.86      www       375: 
1.69      www       376:     function LONCAPAreg() {
1.159     www       377: 	  menu=window.open("$nothing","LONCAPAmenu","",false);
1.86      www       378:           menu.clearTimeout(menu.menucltim);
1.174     www       379:           $timesync
1.69      www       380: 	  menu.currentURL=window.location.pathname;
1.175     www       381:           menu.reloadURL=window.location.pathname;
1.69      www       382:           menu.currentStale=0;
1.85      www       383:           menu.clearbut(3,1);
                    384:           menu.switchbutton
1.108     www       385:        (6,3,'catalog.gif','catalog','info','catalog_info()');
                    386:           menu.switchbutton
1.85      www       387:        (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
                    388:           menu.switchbutton
1.184     www       389:     (8,2,'fdbk.gif','feedback','discuss','gopost("/adm/feedback",currentURL)');
1.85      www       390:           menu.switchbutton
                    391:      (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
                    392:           menu.switchbutton
                    393:        (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
                    394:           menu.switchbutton
                    395:      (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
1.94      www       396:           menu.switchbutton
                    397:                             (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
                    398:           menu.switchbutton
                    399:                          (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
                    400:           menu.switchbutton
1.95      www       401:                                (9,3,'anot.gif','anno-','tations','annotate()');
1.87      www       402:           $hwkadd
1.69      www       403:     }
1.86      www       404: 
1.69      www       405:     function LONCAPAstale() {
1.159     www       406: 	  menu=window.open("$nothing","LONCAPAmenu","",false);
1.86      www       407:           menu.currentStale=1;
1.175     www       408:           if (menu.reloadURL!='' && menu.reloadURL!= null) { 
                    409:              menu.switchbutton
                    410:              (3,1,'reload.gif','return','location','go(reloadURL)');
                    411: 	  }
1.127     www       412:           menu.clearbut(7,1);
                    413:           menu.clearbut(7,2);
                    414:           menu.clearbut(7,3);
1.86      www       415:           menu.menucltim=menu.setTimeout(
1.94      www       416:  'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
1.108     www       417:  'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
1.86      www       418: 			  2000);
                    419: 
1.87      www       420:       }
1.86      www       421: 
                    422: // END LON-CAPA Internal
                    423: </script>
                    424: ENDREGTHIS
                    425: 
                    426:     } else {
1.155     matthew   427:         $result = (<<ENDDONOTREGTHIS);
1.86      www       428: 
                    429: <script language="JavaScript">
                    430: // BEGIN LON-CAPA Internal
                    431: 
                    432:     function LONCAPAreg() {
1.159     www       433: 	  menu=window.open("$nothing","LONCAPAmenu","",false);
1.174     www       434:           $timesync
1.69      www       435:           menu.currentStale=1;
1.85      www       436:           menu.clearbut(2,1);
                    437:           menu.clearbut(2,3);
                    438:           menu.clearbut(8,1);
                    439:           menu.clearbut(8,2);
                    440:           menu.clearbut(8,3);
1.86      www       441:           if (menu.currentURL) {
                    442:              menu.switchbutton
                    443:               (3,1,'reload.gif','return','location','go(currentURL)');
                    444:  	  } else {
                    445: 	      menu.clearbut(3,1);
                    446:           }
                    447:     }
                    448: 
                    449:     function LONCAPAstale() {
1.68      www       450:     }
1.86      www       451: 
1.71      www       452: // END LON-CAPA Internal
1.68      www       453: </script>
1.86      www       454: ENDDONOTREGTHIS
1.155     matthew   455:     }
                    456:     return $result;
1.69      www       457: }
                    458: 
                    459: sub loadevents() {
                    460:     return 'LONCAPAreg();';
                    461: }
                    462: 
                    463: sub unloadevents() {
                    464:     return 'LONCAPAstale();';
1.68      www       465: }
                    466: 
1.48      albertel  467: sub printalltags {
                    468:   my $temp;
                    469:   foreach $temp (sort keys %Apache::lonxml::alltags) {
1.141     albertel  470:     &Apache::lonxml::debug("$temp -- ".
                    471: 		  join(',',@{ $Apache::lonxml::alltags{$temp} }));
1.48      albertel  472:   }
                    473: }
1.31      sakharuk  474: 
1.3       sakharuk  475: sub xmlparse {
1.172     albertel  476:  my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
1.96      albertel  477: 
1.172     albertel  478:  &setup_globals($request,$target);
1.178     www       479: #
                    480: # do we have a course style file?
                    481: #
                    482: 
                    483:  if ($ENV{'request.course.id'}) {
                    484:      my $bodytext=
                    485: 	 $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
                    486:      if ($bodytext) {
                    487:        my $location=&Apache::lonnet::filelocation('',$bodytext);
                    488:        my $styletext=&Apache::lonnet::getfile($location);
                    489:        if ($styletext ne '-1') {
                    490:           %style_for_target = (%style_for_target,
                    491:                           &Apache::style::styleparser($target,$styletext));
                    492:        }
                    493:     }
                    494:  }
                    495: 
1.48      albertel  496:  #&printalltags();
1.16      albertel  497:  my @pars = ();
1.23      albertel  498:  my $pwd=$ENV{'request.filename'};
                    499:  $pwd =~ s:/[^/]*$::;
                    500:  &newparser(\@pars,\$content_file_string,$pwd);
1.24      sakharuk  501: 
1.3       sakharuk  502:  my $safeeval = new Safe;
1.40      albertel  503:  my $safehole = new Safe::Hole;
1.82      ng        504:  &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3       sakharuk  505: #-------------------- Redefinition of the target in the case of compound target
                    506: 
                    507:  ($target, my @tenta) = split('&&',$target);
                    508: 
1.150     albertel  509:  my @stack = ();
1.3       sakharuk  510:  my @parstack = ();
1.17      albertel  511:  &initdepth;
1.67      www       512: 
1.101     albertel  513:  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
                    514: 				   $safeeval,\%style_for_target);
1.125     www       515:  if ($ENV{'request.uri'}) {
                    516:     &writeallows($ENV{'request.uri'});
                    517:  }
1.3       sakharuk  518:  return $finaloutput;
1.106     www       519: }
                    520: 
                    521: sub htmlclean {
1.107     www       522:     my ($raw,$full)=@_;
1.106     www       523: 
                    524:     my $tree = HTML::TreeBuilder->new;
                    525:     $tree->ignore_unknown(0);
1.140     albertel  526: 
1.106     www       527:     $tree->parse($raw);
                    528: 
1.107     www       529:     my $output= $tree->as_HTML(undef,' ');
1.140     albertel  530: 
1.161     albertel  531:     $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
1.111     www       532:     $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
1.107     www       533:     unless ($full) {
                    534:        $output=~s/\<[\/]*(body|head|html)\>//gis;
                    535:     }
1.106     www       536: 
                    537:     $tree = $tree->delete;
                    538: 
                    539:     return $output;
1.15      albertel  540: }
                    541: 
1.191     albertel  542: sub latex_special_symbols {
1.188     sakharuk  543:     my ($current_token,$stack,$parstack)=@_;
1.192   ! albertel  544:     $current_token=~s/\\/\\char92 /g;
        !           545:     $current_token=~s/\^/\\char94 /g;
        !           546:     $current_token=~s/\~/\\char126 /g;
        !           547:     $current_token=~s/(&[^a-z#])/\\$1/g;
        !           548:     $current_token=~s/([^&]\#)/\\$1/g;
        !           549:     $current_token=~s/(\$|_|{|})/\\$1/g;
        !           550:     $current_token=~s/\\char92 /\\texttt{\\char92}/g;
        !           551:     $current_token=~s/>/\$>\$/g; #more
        !           552:     $current_token=~s/</\$<\$/g; #less
        !           553:     if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
        !           554:     if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
1.188     sakharuk  555:     return $current_token;
                    556: }
                    557: 
1.101     albertel  558: sub inner_xmlparse {
                    559:   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
                    560:   my $finaloutput = '';
                    561:   my $result;
                    562:   my $token;
                    563:   while ( $#$pars > -1 ) {
                    564:     while ($token = $$pars['-1']->get_token) {
                    565:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
                    566: 	if ($metamode<1) {
1.190     albertel  567: 	    my $text=$token->[1];
                    568: 	    if ($token->[0] eq 'C') {
                    569: 		$text = '%'.$text;
                    570: 		$text =~ s/[\n\r]//g;
1.182     sakharuk  571: 	    }
1.190     albertel  572: 	    $result.=$text;
1.101     albertel  573: 	}
                    574:       } elsif ($token->[0] eq 'PI') {
                    575: 	if ($metamode<1) {
                    576: 	  $result=$token->[2];
                    577: 	}
                    578:       } elsif ($token->[0] eq 'S') {
1.140     albertel  579: 	# add tag to stack
1.101     albertel  580: 	push (@$stack,$token->[1]);
                    581: 	# add parameters list to another stack
                    582: 	push (@$parstack,&parstring($token));
1.140     albertel  583: 	&increasedepth($token);
1.101     albertel  584: 	if (exists $$style_for_target{$token->[1]}) {
                    585: 	  if ($Apache::lonxml::redirection) {
1.140     albertel  586: 	    $Apache::lonxml::outputstack['-1'] .=
1.101     albertel  587: 	      &recurse($$style_for_target{$token->[1]},$target,$safeeval,
                    588: 		       $style_for_target,@$parstack);
                    589: 	  } else {
                    590: 	    $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
                    591: 				     $safeeval,$style_for_target,@$parstack);
                    592: 	  }
                    593: 	} else {
                    594: 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
                    595: 			     $parstack, $pars, $safeeval, $style_for_target);
1.140     albertel  596: 	}
1.101     albertel  597:       } elsif ($token->[0] eq 'E') {
                    598: 	#clear out any tags that didn't end
                    599: 	while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
1.150     albertel  600: 	  my $lasttag=$$stack[-1];
                    601: 	  if ($token->[1] =~ /^$lasttag$/i) {
                    602: 	    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; as end tag to &lt;'.$$stack[-1].'&gt;');
                    603: 	    last;
                    604: 	  } else {
1.152     albertel  605: 	    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; when looking for &lt;/'.$$stack[-1].'&gt; in file');
1.150     albertel  606: 	    &end_tag($stack,$parstack,$token);
                    607: 	  }
1.101     albertel  608: 	}
1.140     albertel  609: 
                    610: 	if (exists($$style_for_target{'/'."$token->[1]"})) {
1.101     albertel  611: 	  if ($Apache::lonxml::redirection) {
                    612: 	    $Apache::lonxml::outputstack['-1'] .=  
                    613: 	      &recurse($$style_for_target{'/'."$token->[1]"},
                    614: 		       $target,$safeeval,$style_for_target,@$parstack);
                    615: 	  } else {
                    616: 	    $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
                    617: 				     $target,$safeeval,$style_for_target,
                    618: 				     @$parstack);
                    619: 	  }
                    620: 	} else {
                    621: 	  $result = &callsub("end_$token->[1]", $target, $token, $stack,
                    622: 			     $parstack, $pars,$safeeval, $style_for_target);
                    623: 	}
                    624:       } else {
                    625: 	&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
                    626:       }
                    627:       #evaluate variable refs in result
                    628:       if ($result ne "") {
                    629: 	if ( $#$parstack > -1 ) {
1.169     albertel  630: 	  $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
1.101     albertel  631: 	} else {
1.169     albertel  632: 	  $result= &Apache::run::evaluate($result,$safeeval,'');
1.101     albertel  633: 	}
1.163     albertel  634:       }
1.190     albertel  635:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
                    636: 	if ($target eq 'tex') {
1.191     albertel  637: 	    $result=&latex_special_symbols($result,$stack,$parstack);
1.190     albertel  638: 	}
                    639:       }
                    640: 
1.169     albertel  641:       # Encode any high ASCII characters
                    642:       if (!$Apache::lonxml::prevent_entity_encode) {
                    643: 	$result=&HTML::Entities::encode($result,"\200-\377");
                    644:       }
                    645:       if ($Apache::lonxml::redirection) {
                    646: 	$Apache::lonxml::outputstack['-1'] .= $result;
                    647:       } else {
                    648: 	$finaloutput.=$result;
                    649:       }
                    650:       $result = '';
                    651: 
1.101     albertel  652:       if ($token->[0] eq 'E') { 
                    653: 	&end_tag($stack,$parstack,$token);
                    654:       }
                    655:     }
                    656:     pop @$pars;
                    657:     pop @Apache::lonxml::pwd;
                    658:   }
                    659: 
                    660:   # if ($target eq 'meta') {
                    661:   #   $finaloutput.=&endredirection;
                    662:   # }
                    663: 
1.169     albertel  664: 
1.101     albertel  665:   if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
                    666:     $finaloutput=&afterburn($finaloutput);
                    667:   }
                    668:   return $finaloutput;
                    669: }
1.67      www       670: 
1.15      albertel  671: sub recurse {
                    672:   my @innerstack = (); 
                    673:   my @innerparstack = ();
                    674:   my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
1.16      albertel  675:   my @pat = ();
1.23      albertel  676:   &newparser(\@pat,\$newarg);
1.15      albertel  677:   my $tokenpat;
                    678:   my $partstring = '';
                    679:   my $output='';
1.16      albertel  680:   my $decls='';
1.140     albertel  681:   &Apache::lonxml::debug("Recursing");
1.16      albertel  682:   while ( $#pat > -1 ) {
                    683:     while  ($tokenpat = $pat[$#pat]->get_token) {
1.57      albertel  684:       if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
1.61      albertel  685: 	if ($metamode<1) { $partstring=$tokenpat->[1]; }
1.57      albertel  686:       } elsif ($tokenpat->[0] eq 'PI') {
1.61      albertel  687: 	if ($metamode<1) { $partstring=$tokenpat->[2]; }
1.16      albertel  688:       } elsif ($tokenpat->[0] eq 'S') {
                    689: 	push (@innerstack,$tokenpat->[1]);
                    690: 	push (@innerparstack,&parstring($tokenpat));
1.19      albertel  691: 	&increasedepth($tokenpat);
1.84      albertel  692: 	$partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
                    693: 			       \@innerstack, \@innerparstack, \@pat,
                    694: 			       $safeeval, $style_for_target);
1.16      albertel  695:       } elsif ($tokenpat->[0] eq 'E') {
                    696: 	#clear out any tags that didn't end
1.150     albertel  697: 	while ($tokenpat->[1] ne $innerstack[$#innerstack]
1.43      albertel  698: 	       && ($#innerstack > -1)) {
1.150     albertel  699: 	  my $lasttag=$innerstack[-1];
                    700: 	  if ($tokenpat->[1] =~ /^$lasttag$/i) {
                    701: 	    &Apache::lonxml::warning('Using tag &lt;/'.$tokenpat->[1].'&gt; as end tag to &lt;'.$innerstack[-1].'&gt;');
                    702: 	    last;
                    703: 	  } else {
1.152     albertel  704: 	    &Apache::lonxml::warning('Found tag &lt;/'.$tokenpat->[1].'&gt; when looking for &lt;/'.$innerstack[-1].'&gt; in file');
1.150     albertel  705: 	    &end_tag(\@innerstack,\@innerparstack,$tokenpat);
                    706: 	  }
1.43      albertel  707: 	}
1.84      albertel  708: 	$partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
                    709: 			       \@innerstack, \@innerparstack, \@pat,
                    710: 			       $safeeval, $style_for_target);
1.57      albertel  711:       } else {
                    712: 	&Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
1.16      albertel  713:       }
                    714:       #pass both the variable to the style tag, and the tag we 
                    715:       #are processing inside the <definedtag>
                    716:       if ( $partstring ne "" ) {
                    717: 	if ( $#parstack > -1 ) { 
                    718: 	  if ( $#innerparstack > -1 ) { 
                    719: 	    $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
                    720: 	  } else {
                    721: 	    $decls= $parstack[$#parstack];
                    722: 	  }
                    723: 	} else {
                    724: 	  if ( $#innerparstack > -1 ) { 
                    725: 	    $decls=$innerparstack[$#innerparstack];
                    726: 	  } else {
                    727: 	    $decls='';
                    728: 	  }
                    729: 	}
                    730: 	$output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
                    731: 	$partstring = '';
                    732:       }
1.17      albertel  733:       if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
1.19      albertel  734: 				 &decreasedepth($tokenpat);}
1.15      albertel  735:     }
1.16      albertel  736:     pop @pat;
1.23      albertel  737:     pop @Apache::lonxml::pwd;
1.15      albertel  738:   }
1.140     albertel  739:   &Apache::lonxml::debug("Exiting Recursing");
1.15      albertel  740:   return $output;
1.7       albertel  741: }
                    742: 
                    743: sub callsub {
1.84      albertel  744:   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7       albertel  745:   my $currentstring='';
1.72      albertel  746:   my $nodefault;
1.7       albertel  747:   {
1.59      albertel  748:     my $sub1;
1.7       albertel  749:     no strict 'refs';
1.68      www       750:     my $tag=$token->[1];
1.141     albertel  751:     my $space=$Apache::lonxml::alltags{$tag}[-1];
1.68      www       752:     if (!$space) {
1.141     albertel  753:      	$tag=~tr/A-Z/a-z/;
1.68      www       754: 	$sub=~tr/A-Z/a-z/;
1.141     albertel  755: 	$space=$Apache::lonxml::alltags{$tag}[-1]
1.68      www       756:     }
1.97      albertel  757: 
                    758:     my $deleted=0;
                    759:     $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
                    760:     if (($token->[0] eq 'S') && ($target eq 'modified')) {
                    761:       $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
                    762: 					     $parstack,$parser,$safeeval,
                    763: 					     $style);
                    764:     }
                    765:     if (!$deleted) {
                    766:       if ($space) {
1.189     sakharuk  767: 	&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
1.97      albertel  768: 	$sub1="$space\:\:$sub";
                    769: 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
                    770: 					     $parstack,$parser,$safeeval,
                    771: 					     $style);
                    772:       } else {
1.189     sakharuk  773: 	&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
1.97      albertel  774: 	if ($metamode <1) {
                    775: 	  if (defined($token->[4]) && ($metamode < 1)) {
                    776: 	    $currentstring = $token->[4];
                    777: 	  } else {
                    778: 	    $currentstring = $token->[2];
                    779: 	  }
1.62      sakharuk  780: 	}
1.7       albertel  781:       }
1.97      albertel  782:       #    &Apache::lonxml::debug("nodefalt:$nodefault:");
                    783:       if ($currentstring eq '' && $nodefault eq '') {
                    784: 	if ($target eq 'edit') {
                    785: 	  &Apache::lonxml::debug("doing default edit for $token->[1]");
                    786: 	  if ($token->[0] eq 'S') {
                    787: 	    $currentstring = &Apache::edit::tag_start($target,$token);
                    788: 	  } elsif ($token->[0] eq 'E') {
                    789: 	    $currentstring = &Apache::edit::tag_end($target,$token);
                    790: 	  }
                    791: 	} elsif ($target eq 'modified') {
                    792: 	  if ($token->[0] eq 'S') {
                    793: 	    $currentstring = $token->[4];
                    794: 	    $currentstring.=&Apache::edit::handle_insert();
                    795: 	  } else {
                    796: 	    $currentstring = $token->[2];
                    797: 	  }
1.72      albertel  798: 	}
                    799:       }
1.7       albertel  800:     }
                    801:     use strict 'refs';
                    802:   }
                    803:   return $currentstring;
1.82      ng        804: }
                    805: 
1.96      albertel  806: sub setup_globals {
1.172     albertel  807:   my ($request,$target)=@_;
                    808:   $Apache::lonxml::request=$request;
1.99      albertel  809:   $Apache::lonxml::registered = 0;
1.101     albertel  810:   @Apache::lonxml::pwd=();
1.124     albertel  811:   @Apache::lonxml::extlinks=();
1.96      albertel  812:   if ($target eq 'meta') {
                    813:     $Apache::lonxml::redirection = 0;
                    814:     $Apache::lonxml::metamode = 1;
                    815:     $Apache::lonxml::evaluate = 1;
                    816:     $Apache::lonxml::import = 0;
1.129     albertel  817:   } elsif ($target eq 'answer') {
                    818:     $Apache::lonxml::redirection = 0;
                    819:     $Apache::lonxml::metamode = 1;
                    820:     $Apache::lonxml::evaluate = 1;
                    821:     $Apache::lonxml::import = 1;
1.96      albertel  822:   } elsif ($target eq 'grade') {
                    823:     &startredirection;
                    824:     $Apache::lonxml::metamode = 0;
                    825:     $Apache::lonxml::evaluate = 1;
                    826:     $Apache::lonxml::import = 1;
                    827:   } elsif ($target eq 'modified') {
                    828:     $Apache::lonxml::redirection = 0;
                    829:     $Apache::lonxml::metamode = 0;
                    830:     $Apache::lonxml::evaluate = 0;
                    831:     $Apache::lonxml::import = 0;
                    832:   } elsif ($target eq 'edit') {
                    833:     $Apache::lonxml::redirection = 0;
                    834:     $Apache::lonxml::metamode = 0;
                    835:     $Apache::lonxml::evaluate = 0;
                    836:     $Apache::lonxml::import = 0;
1.163     albertel  837:   } elsif ($target eq 'analyze') {
                    838:     $Apache::lonxml::redirection = 0;
                    839:     $Apache::lonxml::metamode = 0;
                    840:     $Apache::lonxml::evaluate = 1;
                    841:     $Apache::lonxml::import = 1;
1.96      albertel  842:   } else {
                    843:     $Apache::lonxml::redirection = 0;
                    844:     $Apache::lonxml::metamode = 0;
                    845:     $Apache::lonxml::evaluate = 1;
                    846:     $Apache::lonxml::import = 1;
                    847:   }
                    848: }
                    849: 
1.82      ng        850: sub init_safespace {
                    851:   my ($target,$safeeval,$safehole,$safeinit) = @_;
                    852:   $safeeval->permit("entereval");
                    853:   $safeeval->permit(":base_math");
                    854:   $safeeval->permit("sort");
                    855:   $safeeval->deny(":base_io");
1.102     albertel  856:   $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
1.82      ng        857:   $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
                    858:   
                    859:   $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
                    860:   $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
                    861:   $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
                    862:   $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
                    863:   $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
                    864:   $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
                    865:   $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
                    866:   $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
                    867:   $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
                    868:   $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
                    869:   $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
                    870:   $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
                    871:   $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
                    872:   $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
                    873:   $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
                    874:   $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
                    875:   $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
                    876:   $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
                    877:   $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
1.91      ng        878:   $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
                    879:   $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
                    880:   $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
                    881:   $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
                    882:   $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
                    883:   $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
                    884:   $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
                    885:   $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
                    886:   $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
                    887:   $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
                    888:   $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
1.93      ng        889:   $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
1.91      ng        890:   $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
                    891:   $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
                    892:   $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
                    893:   $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
                    894:   $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
                    895:   $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
                    896:   $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
                    897:   $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
                    898:   $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
                    899: 
1.82      ng        900: #need to inspect this class of ops
                    901: # $safeeval->deny(":base_orig");
1.91      ng        902:   $safeinit .= ';$external::target="'.$target.'";';
1.121     albertel  903:   my $rndseed;
1.123     albertel  904:   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    905:   $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
1.121     albertel  906:   $safeinit .= ';$external::randomseed='.$rndseed.';';
1.82      ng        907:   &Apache::run::run($safeinit,$safeeval);
1.17      albertel  908: }
                    909: 
1.55      albertel  910: sub startredirection {
                    911:   $Apache::lonxml::redirection++;
                    912:   push (@Apache::lonxml::outputstack, '');
                    913: }
                    914: 
                    915: sub endredirection {
                    916:   if (!$Apache::lonxml::redirection) {
1.72      albertel  917:     &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
1.55      albertel  918:     return '';
                    919:   }
                    920:   $Apache::lonxml::redirection--;
                    921:   pop @Apache::lonxml::outputstack;
1.97      albertel  922: }
                    923: 
                    924: sub end_tag {
                    925:   my ($tagstack,$parstack,$token)=@_;
                    926:   pop(@$tagstack);
                    927:   pop(@$parstack);
                    928:   &decreasedepth($token);
1.55      albertel  929: }
                    930: 
1.17      albertel  931: sub initdepth {
                    932:   @Apache::lonxml::depthcounter=();
                    933:   $Apache::lonxml::depth=-1;
                    934:   $Apache::lonxml::olddepth=-1;
                    935: }
                    936: 
                    937: sub increasedepth {
1.19      albertel  938:   my ($token) = @_;
1.17      albertel  939:   $Apache::lonxml::depth++;
                    940:   $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
                    941:   if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
                    942:     $Apache::lonxml::olddepth=$Apache::lonxml::depth;
                    943:   }
1.42      albertel  944:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  945:   &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1.54      albertel  946: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17      albertel  947: }
                    948: 
                    949: sub decreasedepth {
1.19      albertel  950:   my ($token) = @_;
1.17      albertel  951:   $Apache::lonxml::depth--;
1.36      albertel  952:   if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
                    953:     $#Apache::lonxml::depthcounter--;
                    954:     $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
                    955:   }
1.43      albertel  956:   if (  $Apache::lonxml::depth < -1) {
1.140     albertel  957:     &Apache::lonxml::warning("Missing tags, unable to properly run file.");
1.43      albertel  958:     $Apache::lonxml::depth='-1';
                    959:   }
1.42      albertel  960:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  961:   &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1.54      albertel  962: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1       sakharuk  963: }
1.19      albertel  964: 
1.180     albertel  965: sub get_all_text_unbalanced {
1.190     albertel  966: #there is a copy of this in lonpublisher.pm
1.180     albertel  967:  my($tag,$pars)= @_;
                    968:  my $token;
                    969:  my $result='';
                    970:  $tag='<'.$tag.'>';
                    971:  while ($token = $$pars[-1]->get_token) {
                    972:    if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    973:      $result.=$token->[1];
                    974:    } elsif ($token->[0] eq 'PI') {
                    975:      $result.=$token->[2];
                    976:    } elsif ($token->[0] eq 'S') {
                    977:      $result.=$token->[4];
                    978:    } elsif ($token->[0] eq 'E')  {
                    979:      $result.=$token->[2];
                    980:    }
                    981:    if ($result =~ /(.*)$tag(.*)/) {
                    982:      &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
                    983:      &Apache::lonxml::debug('Result is :'.$1);
                    984:      $result=$1;
                    985:      my $redo=$tag.$2;
                    986:      &Apache::lonxml::newparser($pars,\$redo);
                    987:      last;
                    988:    }
                    989:  }
                    990:  return $result
                    991: }
                    992: 
1.19      albertel  993: sub get_all_text {
                    994:  my($tag,$pars)= @_;
                    995:  my $depth=0;
                    996:  my $token;
                    997:  my $result='';
1.57      albertel  998:  if ( $tag =~ m:^/: ) { 
                    999:    my $tag=substr($tag,1); 
                   1000: #   &Apache::lonxml::debug("have:$tag:");
                   1001:    while (($depth >=0) && ($token = $pars->get_token)) {
                   1002: #     &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
                   1003:      if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                   1004:        $result.=$token->[1];
                   1005:      } elsif ($token->[0] eq 'PI') {
                   1006:        $result.=$token->[2];
                   1007:      } elsif ($token->[0] eq 'S') {
1.151     albertel 1008:        if ($token->[1] =~ /^$tag$/i) { $depth++; }
1.57      albertel 1009:        $result.=$token->[4];
                   1010:      } elsif ($token->[0] eq 'E')  {
1.151     albertel 1011:        if ( $token->[1] =~ /^$tag$/i) { $depth--; }
1.57      albertel 1012:        #skip sending back the last end tag
                   1013:        if ($depth > -1) { $result.=$token->[2]; } else {
                   1014: 	 $pars->unget_token($token);
                   1015:        }
                   1016:      }
                   1017:    }
                   1018:  } else {
                   1019:    while ($token = $pars->get_token) {
                   1020: #     &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
                   1021:      if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                   1022:        $result.=$token->[1];
                   1023:      } elsif ($token->[0] eq 'PI') {
                   1024:        $result.=$token->[2];
                   1025:      } elsif ($token->[0] eq 'S') {
1.151     albertel 1026:        if ( $token->[1] =~ /^$tag$/i) {
1.57      albertel 1027: 	 $pars->unget_token($token); last;
                   1028:        } else {
                   1029: 	 $result.=$token->[4];
                   1030:        }
                   1031:      } elsif ($token->[0] eq 'E')  {
                   1032:        $result.=$token->[2];
1.36      albertel 1033:      }
1.19      albertel 1034:    }
                   1035:  }
1.49      albertel 1036: # &Apache::lonxml::debug("Exit:$result:");
1.19      albertel 1037:  return $result
                   1038: }
                   1039: 
1.23      albertel 1040: sub newparser {
                   1041:   my ($parser,$contentref,$dir) = @_;
1.167     albertel 1042:   push (@$parser,HTML::LCParser->new($contentref));
1.56      albertel 1043:   $$parser['-1']->xml_mode('1');
1.23      albertel 1044:   if ( $dir eq '' ) {
                   1045:     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
                   1046:   } else {
                   1047:     push (@Apache::lonxml::pwd, $dir);
                   1048:   } 
                   1049: #  &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
                   1050: #  &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
                   1051: }
1.1       sakharuk 1052: 
1.8       albertel 1053: sub parstring {
                   1054:   my ($token) = @_;
                   1055:   my $temp='';
1.142     albertel 1056:   foreach (@{$token->[3]}) {
1.35      www      1057:     unless ($_=~/\W/) {
1.42      albertel 1058:       my $val=$token->[2]->{$_};
1.150     albertel 1059:       $val =~ s/([\%\@\\\"])/\\$1/g;
1.51      albertel 1060:       #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.42      albertel 1061:       $temp .= "my \$$_=\"$val\";"
1.20      albertel 1062:     }
1.142     albertel 1063:   }
1.8       albertel 1064:   return $temp;
                   1065: }
1.22      albertel 1066: 
1.34      www      1067: sub writeallows {
1.126     www      1068:     unless ($#extlinks>=0) { return; }
1.34      www      1069:     my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1.111     www      1070:     if ($ENV{'httpref.'.$thisurl}) {
                   1071: 	$thisurl=$ENV{'httpref.'.$thisurl};
                   1072:     }
1.34      www      1073:     my $thisdir=$thisurl;
                   1074:     $thisdir=~s/\/[^\/]+$//;
                   1075:     my %httpref=();
1.142     albertel 1076:     foreach (@extlinks) {
1.34      www      1077:        $httpref{'httpref.'.
1.125     www      1078:  	        &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1.142     albertel 1079:     }
1.126     www      1080:     @extlinks=();
1.34      www      1081:     &Apache::lonnet::appenv(%httpref);
                   1082: }
                   1083: 
1.66      www      1084: #
                   1085: # Afterburner handles anchors, highlights and links
                   1086: #
                   1087: sub afterburn {
                   1088:     my $result=shift;
1.154     albertel 1089:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1090: 					    ['highlight','anchor','link']);
1.66      www      1091:     if ($ENV{'form.highlight'}) {
1.142     albertel 1092:        foreach (split(/\,/,$ENV{'form.highlight'})) {
1.66      www      1093:            my $anchorname=$_;
                   1094: 	   my $matchthis=$anchorname;
                   1095:            $matchthis=~s/\_+/\\s\+/g;
                   1096:            $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1.142     albertel 1097:        }
1.66      www      1098:     }
                   1099:     if ($ENV{'form.link'}) {
1.142     albertel 1100:        foreach (split(/\,/,$ENV{'form.link'})) {
1.66      www      1101:            my ($anchorname,$linkurl)=split(/\>/,$_);
                   1102: 	   my $matchthis=$anchorname;
                   1103:            $matchthis=~s/\_+/\\s\+/g;
                   1104:            $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1.142     albertel 1105:        }
1.66      www      1106:     }
                   1107:     if ($ENV{'form.anchor'}) {
                   1108:         my $anchorname=$ENV{'form.anchor'};
                   1109: 	my $matchthis=$anchorname;
                   1110:         $matchthis=~s/\_+/\\s\+/g;
                   1111:         $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
                   1112:         $result.=(<<"ENDSCRIPT");
                   1113: <script>
                   1114:     document.location.hash='$anchorname';
                   1115: </script>
                   1116: ENDSCRIPT
                   1117:     }
                   1118:     return $result;
                   1119: }
                   1120: 
1.79      www      1121: sub storefile {
                   1122:     my ($file,$contents)=@_;
                   1123:     if (my $fh=Apache::File->new('>'.$file)) {
                   1124: 	print $fh $contents;
                   1125:         $fh->close();
1.147     albertel 1126:     } else {
                   1127:       &warning("Unable to save file $file");
1.79      www      1128:     }
                   1129: }
                   1130: 
1.151     albertel 1131: sub createnewhtml {
                   1132:   my $filecontents=(<<SIMPLECONTENT);
1.78      www      1133: <html>
                   1134: <head>
                   1135: <title>
                   1136:                            Title of Document Goes Here
                   1137: </title>
                   1138: </head>
                   1139: <body bgcolor="#FFFFFF">
                   1140: 
                   1141:                            Body of Document Goes Here
                   1142: 
                   1143: </body>
                   1144: </html>
                   1145: SIMPLECONTENT
1.151     albertel 1146:   return $filecontents;
                   1147: }
                   1148: 
1.147     albertel 1149: 
1.151     albertel 1150: sub inserteditinfo {
                   1151:       my ($result,$filecontents)=@_;
1.157     albertel 1152:       $filecontents = &HTML::Entities::encode($filecontents);
1.147     albertel 1153: #      my $editheader='<a href="#editsection">Edit below</a><hr />';
1.161     albertel 1154:       my $buttons=(<<BUTTONS);
                   1155: <input type="submit" name="attemptclean" 
                   1156:        value="Save and then attempt to clean HTML" />
                   1157: <input type="submit" name="savethisfile" value="Save this" />
                   1158: <input type="submit" name="viewmode" value="View" />
                   1159: BUTTONS
1.78      www      1160:       my $editfooter=(<<ENDFOOTER);
                   1161: <hr />
                   1162: <a name="editsection" />
                   1163: <form method="post">
1.161     albertel 1164: <input type="hidden" name="editmode" value="Edit" />
1.170     www      1165: $buttons<br />
1.78      www      1166: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1.170     www      1167: <br />$buttons
1.78      www      1168: <br />
                   1169: </form>
                   1170: ENDFOOTER
1.147     albertel 1171: #      $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1.78      www      1172:       $result=~s/(\<\/body\>)/$editfooter/is;
                   1173:       return $result;
                   1174: }
                   1175: 
1.152     albertel 1176: sub get_target {
                   1177:   my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                   1178:   if ( $ENV{'request.state'} eq 'published') {
                   1179:     if ( defined($ENV{'form.grade_target'})
                   1180: 	 && ($viewgrades == 'F' )) {
                   1181:       return ($ENV{'form.grade_target'});
1.153     albertel 1182:     } elsif (defined($ENV{'form.grade_target'})) {
                   1183:       if (($ENV{'form.grade_target'} eq 'web') ||
                   1184: 	  ($ENV{'form.grade_target'} eq 'tex') ) {
                   1185: 	return $ENV{'form.grade_target'}
                   1186:       } else {
                   1187: 	return 'web';
                   1188:       }
1.152     albertel 1189:     } else {
                   1190:       return 'web';
                   1191:     }
                   1192:   } elsif ($ENV{'request.state'} eq 'construct') {
                   1193:     if ( defined($ENV{'form.grade_target'})) {
                   1194:       return ($ENV{'form.grade_target'});
                   1195:     } else {
                   1196:       return 'web';
                   1197:     }
                   1198:   } else {
                   1199:     return 'web';
                   1200:   }
                   1201: }
                   1202: 
1.24      sakharuk 1203: sub handler {
                   1204:   my $request=shift;
1.68      www      1205: 
1.152     albertel 1206:   my $target=&get_target();
1.68      www      1207: 
1.65      albertel 1208:   $Apache::lonxml::debug=0;
1.68      www      1209: 
1.25      sakharuk 1210:   if ($ENV{'browser.mathml'}) {
1.27      albertel 1211:     $request->content_type('text/xml');
                   1212:   } else {
                   1213:     $request->content_type('text/html');
1.25      sakharuk 1214:   }
1.141     albertel 1215:   &Apache::loncommon::no_cache($request);
1.27      albertel 1216:   $request->send_http_header;
1.141     albertel 1217: 
1.45      www      1218:   return OK if $request->header_only;
1.27      albertel 1219: 
1.79      www      1220: 
                   1221:   my $file=&Apache::lonnet::filelocation("",$request->uri);
1.78      www      1222: #
                   1223: # Edit action? Save file.
                   1224: #
                   1225:   unless ($ENV{'request.state'} eq 'published') {
1.107     www      1226:       if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1.79      www      1227: 	  &storefile($file,$ENV{'form.filecont'});
1.78      www      1228:       }
                   1229:   }
1.24      sakharuk 1230:   my %mystyle;
1.147     albertel 1231:   my $result = '';
1.50      albertel 1232:   my $filecontents=&Apache::lonnet::getfile($file);
                   1233:   if ($filecontents == -1) {
1.78      www      1234:     $result=(<<ENDNOTFOUND);
                   1235: <html>
                   1236: <head>
                   1237: <title>File not found</title>
                   1238: </head>
                   1239: <body bgcolor="#FFFFFF">
                   1240: <b>File not found: $file</b>
                   1241: </body>
                   1242: </html>
                   1243: ENDNOTFOUND
1.50      albertel 1244:     $filecontents='';
1.151     albertel 1245:     if ($ENV{'request.state'} ne 'published') {
                   1246:       $filecontents=&createnewhtml();
1.161     albertel 1247:       $ENV{'form.editmode'}='Edit'; #force edit mode
1.151     albertel 1248:     }
1.50      albertel 1249:   } else {
1.147     albertel 1250:     unless ($ENV{'request.state'} eq 'published') {
                   1251:       if ($ENV{'form.attemptclean'}) {
                   1252: 	$filecontents=&htmlclean($filecontents,1);
1.107     www      1253:       }
1.147     albertel 1254:     }
1.161     albertel 1255:     if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1.172     albertel 1256:       $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
                   1257: 					  '',%mystyle);
1.147     albertel 1258:     }
1.78      www      1259:   }
                   1260: 
                   1261: #
                   1262: # Edit action? Insert editing commands
                   1263: #
                   1264:   unless ($ENV{'request.state'} eq 'published') {
1.161     albertel 1265:     if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1.177     www      1266: 	my $displayfile=$request->uri;
                   1267:         $displayfile=~s/^\/[^\/]*//;
                   1268:       $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
                   1269:               '</h3></body></html>';
1.78      www      1270:       $result=&inserteditinfo($result,$filecontents);
1.147     albertel 1271:     }
1.66      www      1272:   }
1.147     albertel 1273: 
1.126     www      1274:   writeallows($request->uri);
1.50      albertel 1275: 
1.67      www      1276:   $request->print($result);
1.64      albertel 1277: 
1.45      www      1278:   return OK;
1.24      sakharuk 1279: }
1.147     albertel 1280: 
1.22      albertel 1281: sub debug {
                   1282:   if ($Apache::lonxml::debug eq 1) {
1.146     albertel 1283:     $|=1;
1.180     albertel 1284:     print("DEBUG:".&HTML::Entities::encode($_[0])."<br />\n");
1.22      albertel 1285:   }
                   1286: }
1.49      albertel 1287: 
1.22      albertel 1288: sub error {
1.74      albertel 1289:   if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1.166     matthew  1290:     # If printing in construction space, put the error inside <pre></pre>
1.167     albertel 1291:     print "<b>ERROR:</b>".join("\n",@_)."\n";
1.52      albertel 1292:   } else {
                   1293:     print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
                   1294:     #notify author
1.146     albertel 1295:     &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1.52      albertel 1296:     #notify course
                   1297:     if ( $ENV{'request.course.id'} ) {
                   1298:       my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1.143     www      1299:       my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1.52      albertel 1300:       foreach my $user (split /\,/, $users) {
                   1301: 	($user,my $domain) = split /:/, $user;
1.143     www      1302: 	&Apache::lonmsg::user_normal_msg($user,$domain,
1.146     albertel 1303:         "Error [$declutter]",join('<br />',@_));
1.52      albertel 1304:       }
                   1305:     }
1.74      albertel 1306: 
1.52      albertel 1307:     #FIXME probably shouldn't have me get everything forever.
1.146     albertel 1308:     &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1.74      albertel 1309:     #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1.52      albertel 1310:   }
1.22      albertel 1311: }
1.49      albertel 1312: 
1.22      albertel 1313: sub warning {
1.73      harris41 1314:   if ($ENV{'request.state'} eq 'construct') {
1.146     albertel 1315:     print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1.73      harris41 1316:   }
1.83      albertel 1317: }
                   1318: 
                   1319: sub get_param {
                   1320:   my ($param,$parstack,$safeeval,$context) = @_;
                   1321:   if ( ! $context ) { $context = -1; }
                   1322:   my $args ='';
                   1323:   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.157     albertel 1324:   if ( ! $args ) { return undef; }
1.131     albertel 1325:   if ( $args =~ /my \$$param=\"/ ) {
                   1326:     return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
                   1327:   } else {
                   1328:     return undef;
                   1329:   }
1.22      albertel 1330: }
                   1331: 
1.132     albertel 1332: sub get_param_var {
                   1333:   my ($param,$parstack,$safeeval,$context) = @_;
                   1334:   if ( ! $context ) { $context = -1; }
                   1335:   my $args ='';
                   1336:   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
                   1337:   if ( $args !~ /my \$$param=\"/ ) { return undef; }
                   1338:   my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
                   1339:   if ($value =~ /^[\$\@\%]/) {
                   1340:     return &Apache::run::run("return $value",$safeeval,1);
                   1341:   } else {
                   1342:     return $value;
                   1343:   }
                   1344: }
                   1345: 
1.74      albertel 1346: sub register_insert {
1.75      albertel 1347:   my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74      albertel 1348:   my $i;
1.76      albertel 1349:   my $tagnum=0;
1.74      albertel 1350:   my @order;
                   1351:   for ($i=0;$i < $#data; $i++) {
                   1352:     my $line = $data[$i];
                   1353:     if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
                   1354:     if ( $line =~ /TABLE/ ) { last; }
1.92      albertel 1355:     my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1.135     albertel 1356:     if ($tag) {
                   1357:       $insertlist{"$tagnum.tag"} = $tag;
                   1358:       $insertlist{"$tagnum.description"} = $descrip;
                   1359:       $insertlist{"$tagnum.color"} = $color;
                   1360:       $insertlist{"$tagnum.function"} = $function;
                   1361:       if (!defined($show)) { $show='yes'; }
                   1362:       $insertlist{"$tagnum.show"}= $show;
                   1363:       $insertlist{"$tag.num"}=$tagnum;
                   1364:       $tagnum++;
                   1365:     }
1.74      albertel 1366:   }
1.76      albertel 1367:   $i++; #skipping TABLE line
                   1368:   $tagnum = 0;
1.74      albertel 1369:   for (;$i < $#data;$i++) {
                   1370:     my $line = $data[$i];
1.76      albertel 1371:     my ($mnemonic,@which) = split(/ +/,$line);
                   1372:     my $tag = $insertlist{"$tagnum.tag"};
1.144     matthew  1373:     for (my $j=0;$j <=$#which;$j++) {
1.74      albertel 1374:       if ( $which[$j] eq 'Y' ) {
1.76      albertel 1375: 	if ($insertlist{"$j.show"} ne 'no') {
                   1376: 	  push(@{ $insertlist{"$tag.which"} },$j);
                   1377: 	}
1.74      albertel 1378:       }
                   1379:     }
1.76      albertel 1380:     $tagnum++;
1.74      albertel 1381:   }
                   1382: }
1.98      albertel 1383: 
                   1384: sub description {
                   1385:   my ($token)=@_;
1.138     albertel 1386:   my $tagnum;
                   1387:   my $tag=$token->[1];
                   1388:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1389:     my $testtag=$namespace.'::'.$tag;
                   1390:     $tagnum=$insertlist{"$testtag.num"};
                   1391:     if (defined($tagnum)) { last; }
                   1392:   }
                   1393:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1394:   return $insertlist{$tagnum.'.description'};
1.98      albertel 1395: }
1.123     albertel 1396: 
                   1397: # ----------------------------------------------------------------- whichuser
                   1398: # returns a list of $symb, $courseid, $domain, $name that is correct for
                   1399: # calls to lonnet functions for this setup.
                   1400: # - looks for form.grade_ parameters
                   1401: sub whichuser {
1.134     albertel 1402:   my ($symb,$courseid,$domain,$name);
1.123     albertel 1403:   if (defined($ENV{'form.grade_symb'})) {
                   1404:     my $tmp_courseid=$ENV{'form.grade_courseid'};
                   1405:     my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
                   1406:     if ($allowed) {
                   1407:       $symb=$ENV{'form.grade_symb'};
                   1408:       $courseid=$ENV{'form.grade_courseid'};
                   1409:       $domain=$ENV{'form.grade_domain'};
                   1410:       $name=$ENV{'form.grade_username'};
                   1411:     }
1.134     albertel 1412:   } else {
                   1413:     $symb=&Apache::lonnet::symbread();
                   1414:     $courseid=$ENV{'request.course.id'};
                   1415:     $domain=$ENV{'user.domain'};
                   1416:     $name=$ENV{'user.name'};
1.123     albertel 1417:   }
                   1418:   return ($symb,$courseid,$domain,$name);
                   1419: }
                   1420: 
1.1       sakharuk 1421: 1;
                   1422: __END__
1.68      www      1423: 
                   1424: 

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